Load driver and luminaire including the load driver

摘要

Various embodiments relate to a load driver and a luminaire including the load driver. The load driver may include a voltage limiting circuit including a first polar capacitor and a second polar capacitor connected in inverse series, which are connected in parallel respectively with first and second current limiting elements, where the first and second current limiting elements limit the direction in which current flows so that current flows through different polar capacitors in positive and negative halves of a cycle of an alternating-current power supply.

主权项

1. A load driver coupled with an alternating-current power supply, comprising a voltage limiting circuit comprising a first polar capacitor and a second polar capacitor connected in inverse series, which are connected in parallel respectively with first and second current limiting elements, wherein at least one of the first current limiting element and the second current limiting element is an MOSFET, and the gate of each MOSFET is connected to a respective driving source, which controls the MOSFET so that the current flows through different polar capacitors in positive and negative halves of a cycle of the alternating-current power supply, wherein the driving source is an external driving source or an internal driving source, wherein the internal driving source comprises a signal for controlling the gate of a respective MOSFET, tapped from a circuit comprising a respective polar capacitor activated concurrently with the MOSFET.